Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2018-present Open Networking Foundation |
| 3 | |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package dhcp |
| 18 | |
| 19 | import ( |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 20 | "context" |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 21 | "errors" |
| 22 | "fmt" |
Shrey Baid | 688b424 | 2020-07-10 20:40:10 +0530 | [diff] [blame^] | 23 | "net" |
| 24 | "reflect" |
| 25 | "strconv" |
| 26 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 27 | "github.com/google/gopacket" |
| 28 | "github.com/google/gopacket/layers" |
| 29 | "github.com/looplab/fsm" |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 30 | "github.com/opencord/bbsim/internal/bbsim/packetHandlers" |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 31 | bbsim "github.com/opencord/bbsim/internal/bbsim/types" |
| 32 | omci "github.com/opencord/omci-sim" |
Matteo Scandolo | 3de9de0 | 2019-11-14 13:40:03 -0800 | [diff] [blame] | 33 | "github.com/opencord/voltha-protos/v2/go/openolt" |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 34 | log "github.com/sirupsen/logrus" |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 35 | ) |
| 36 | |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 37 | var GetGemPortId = omci.GetGemPortId |
| 38 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 39 | var dhcpLogger = log.WithFields(log.Fields{ |
| 40 | "module": "DHCP", |
| 41 | }) |
| 42 | |
| 43 | var defaultParamsRequestList = []layers.DHCPOpt{ |
| 44 | layers.DHCPOptSubnetMask, |
| 45 | layers.DHCPOptBroadcastAddr, |
| 46 | layers.DHCPOptTimeOffset, |
| 47 | layers.DHCPOptRouter, |
| 48 | layers.DHCPOptDomainName, |
| 49 | layers.DHCPOptDNS, |
| 50 | layers.DHCPOptDomainSearch, |
| 51 | layers.DHCPOptHostname, |
| 52 | layers.DHCPOptNetBIOSTCPNS, |
| 53 | layers.DHCPOptNetBIOSTCPScope, |
| 54 | layers.DHCPOptInterfaceMTU, |
| 55 | layers.DHCPOptClasslessStaticRoute, |
| 56 | layers.DHCPOptNTPServers, |
| 57 | } |
| 58 | |
Matteo Scandolo | 378b8c9 | 2020-04-16 14:34:22 -0700 | [diff] [blame] | 59 | func createDefaultDHCPReq(oltId int, intfId uint32, onuId uint32, mac net.HardwareAddr) layers.DHCPv4 { |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 60 | // NOTE we want to generate a unique XID, the easiest way is to concat the PON ID and the ONU ID |
| 61 | // we increment them by one otherwise: |
Matteo Scandolo | 378b8c9 | 2020-04-16 14:34:22 -0700 | [diff] [blame] | 62 | // - OLT: 0 PON: 0 ONU: 62 = 062 -> 62 |
| 63 | // - OLT: 0 PON: 6 ONU: 2 = 62 -> 62 |
| 64 | xid, err := strconv.Atoi(fmt.Sprintf("%d%d%d", oltId+1, intfId+1, onuId+1)) |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 65 | if err != nil { |
| 66 | log.Fatal("Can't generate unique XID for ONU") |
| 67 | } |
| 68 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 69 | return layers.DHCPv4{ |
| 70 | Operation: layers.DHCPOpRequest, |
| 71 | HardwareType: layers.LinkTypeEthernet, |
| 72 | HardwareLen: 6, |
| 73 | HardwareOpts: 0, |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 74 | Xid: uint32(xid), |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 75 | ClientHWAddr: mac, |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 76 | } |
| 77 | } |
| 78 | |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 79 | func createDefaultOpts(intfId uint32, onuId uint32) []layers.DHCPOption { |
| 80 | hostname := []byte(fmt.Sprintf("%d.%d.bbsim.onf.org", intfId, onuId)) |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 81 | opts := []layers.DHCPOption{} |
| 82 | opts = append(opts, layers.DHCPOption{ |
| 83 | Type: layers.DHCPOptHostname, |
| 84 | Data: hostname, |
| 85 | Length: uint8(len(hostname)), |
| 86 | }) |
| 87 | |
| 88 | bytes := []byte{} |
| 89 | for _, option := range defaultParamsRequestList { |
| 90 | bytes = append(bytes, byte(option)) |
| 91 | } |
| 92 | |
| 93 | opts = append(opts, layers.DHCPOption{ |
| 94 | Type: layers.DHCPOptParamsRequest, |
| 95 | Data: bytes, |
| 96 | Length: uint8(len(bytes)), |
| 97 | }) |
| 98 | return opts |
| 99 | } |
| 100 | |
Matteo Scandolo | 378b8c9 | 2020-04-16 14:34:22 -0700 | [diff] [blame] | 101 | func createDHCPDisc(oltId int, intfId uint32, onuId uint32, macAddress net.HardwareAddr) *layers.DHCPv4 { |
| 102 | dhcpLayer := createDefaultDHCPReq(oltId, intfId, onuId, macAddress) |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 103 | defaultOpts := createDefaultOpts(intfId, onuId) |
Shrey Baid | 688b424 | 2020-07-10 20:40:10 +0530 | [diff] [blame^] | 104 | dhcpLayer.Options = append([]layers.DHCPOption{{ |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 105 | Type: layers.DHCPOptMessageType, |
| 106 | Data: []byte{byte(layers.DHCPMsgTypeDiscover)}, |
| 107 | Length: 1, |
| 108 | }}, defaultOpts...) |
| 109 | |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 110 | data := []byte{0xcd, 0x28, 0xcb, 0xcc, 0x00, 0x01, 0x00, 0x01, |
Matteo Scandolo | 378b8c9 | 2020-04-16 14:34:22 -0700 | [diff] [blame] | 111 | 0x23, 0xed, 0x11, 0xec, 0x4e, 0xfc, 0xcd, 0x28, byte(intfId), byte(onuId)} //FIXME use the OLT-ID in here |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 112 | dhcpLayer.Options = append(dhcpLayer.Options, layers.DHCPOption{ |
| 113 | Type: layers.DHCPOptClientID, |
| 114 | Data: data, |
| 115 | Length: uint8(len(data)), |
| 116 | }) |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 117 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 118 | return &dhcpLayer |
| 119 | } |
| 120 | |
Matteo Scandolo | 378b8c9 | 2020-04-16 14:34:22 -0700 | [diff] [blame] | 121 | func createDHCPReq(oltId int, intfId uint32, onuId uint32, macAddress net.HardwareAddr, offeredIp net.IP) *layers.DHCPv4 { |
| 122 | dhcpLayer := createDefaultDHCPReq(oltId, intfId, onuId, macAddress) |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 123 | defaultOpts := createDefaultOpts(intfId, onuId) |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 124 | |
| 125 | dhcpLayer.Options = append(defaultOpts, layers.DHCPOption{ |
| 126 | Type: layers.DHCPOptMessageType, |
| 127 | Data: []byte{byte(layers.DHCPMsgTypeRequest)}, |
| 128 | Length: 1, |
| 129 | }) |
| 130 | |
| 131 | data := []byte{182, 21, 0, 128} |
| 132 | dhcpLayer.Options = append(dhcpLayer.Options, layers.DHCPOption{ |
| 133 | Type: layers.DHCPOptServerID, |
| 134 | Data: data, |
| 135 | Length: uint8(len(data)), |
| 136 | }) |
| 137 | |
| 138 | data = []byte{0xcd, 0x28, 0xcb, 0xcc, 0x00, 0x01, 0x00, 0x01, |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 139 | 0x23, 0xed, 0x11, 0xec, 0x4e, 0xfc, 0xcd, 0x28, byte(intfId), byte(onuId)} |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 140 | dhcpLayer.Options = append(dhcpLayer.Options, layers.DHCPOption{ |
| 141 | Type: layers.DHCPOptClientID, |
| 142 | Data: data, |
| 143 | Length: uint8(len(data)), |
| 144 | }) |
| 145 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 146 | // NOTE we should not request a specific IP, or we should request the one that has been offered |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 147 | dhcpLayer.Options = append(dhcpLayer.Options, layers.DHCPOption{ |
| 148 | Type: layers.DHCPOptRequestIP, |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 149 | Data: offeredIp, |
| 150 | Length: uint8(len(offeredIp)), |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 151 | }) |
| 152 | return &dhcpLayer |
| 153 | } |
| 154 | |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 155 | func serializeDHCPPacket(intfId uint32, onuId uint32, cTag int, srcMac net.HardwareAddr, dhcp *layers.DHCPv4) ([]byte, error) { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 156 | buffer := gopacket.NewSerializeBuffer() |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 157 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 158 | options := gopacket.SerializeOptions{ |
| 159 | ComputeChecksums: true, |
| 160 | FixLengths: true, |
| 161 | } |
| 162 | |
| 163 | ethernetLayer := &layers.Ethernet{ |
| 164 | SrcMAC: srcMac, |
| 165 | DstMAC: net.HardwareAddr{0xff, 0xff, 0xff, 0xff, 0xff, 0xff}, |
| 166 | EthernetType: layers.EthernetTypeIPv4, |
| 167 | } |
| 168 | |
| 169 | ipLayer := &layers.IPv4{ |
| 170 | Version: 4, |
| 171 | TOS: 0x10, |
| 172 | TTL: 128, |
| 173 | SrcIP: []byte{0, 0, 0, 0}, |
| 174 | DstIP: []byte{255, 255, 255, 255}, |
| 175 | Protocol: layers.IPProtocolUDP, |
| 176 | } |
| 177 | |
| 178 | udpLayer := &layers.UDP{ |
| 179 | SrcPort: 68, |
| 180 | DstPort: 67, |
| 181 | } |
| 182 | |
Shrey Baid | 688b424 | 2020-07-10 20:40:10 +0530 | [diff] [blame^] | 183 | _ = udpLayer.SetNetworkLayerForChecksum(ipLayer) |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 184 | if err := gopacket.SerializeLayers(buffer, options, ethernetLayer, ipLayer, udpLayer, dhcp); err != nil { |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 185 | dhcpLogger.Error("SerializeLayers") |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 186 | return nil, err |
| 187 | } |
| 188 | |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 189 | untaggedPkt := gopacket.NewPacket(buffer.Bytes(), layers.LayerTypeEthernet, gopacket.Default) |
| 190 | |
| 191 | taggedPkt, err := packetHandlers.PushSingleTag(cTag, untaggedPkt) |
| 192 | if err != nil { |
| 193 | dhcpLogger.Error("TagPacket") |
| 194 | return nil, err |
| 195 | } |
| 196 | |
| 197 | return gopacket.Payload(taggedPkt.Data()), nil |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 198 | } |
| 199 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 200 | func GetDhcpLayer(pkt gopacket.Packet) (*layers.DHCPv4, error) { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 201 | layerDHCP := pkt.Layer(layers.LayerTypeDHCPv4) |
| 202 | dhcp, _ := layerDHCP.(*layers.DHCPv4) |
| 203 | if dhcp == nil { |
| 204 | return nil, errors.New("Failed-to-extract-DHCP-layer") |
| 205 | } |
| 206 | return dhcp, nil |
| 207 | } |
| 208 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 209 | func GetDhcpMessageType(dhcp *layers.DHCPv4) (layers.DHCPMsgType, error) { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 210 | for _, option := range dhcp.Options { |
| 211 | if option.Type == layers.DHCPOptMessageType { |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 212 | if reflect.DeepEqual(option.Data, []byte{byte(layers.DHCPMsgTypeDiscover)}) { |
| 213 | return layers.DHCPMsgTypeDiscover, nil |
| 214 | } else if reflect.DeepEqual(option.Data, []byte{byte(layers.DHCPMsgTypeOffer)}) { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 215 | return layers.DHCPMsgTypeOffer, nil |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 216 | } else if reflect.DeepEqual(option.Data, []byte{byte(layers.DHCPMsgTypeRequest)}) { |
| 217 | return layers.DHCPMsgTypeRequest, nil |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 218 | } else if reflect.DeepEqual(option.Data, []byte{byte(layers.DHCPMsgTypeAck)}) { |
| 219 | return layers.DHCPMsgTypeAck, nil |
| 220 | } else if reflect.DeepEqual(option.Data, []byte{byte(layers.DHCPMsgTypeRelease)}) { |
| 221 | return layers.DHCPMsgTypeRelease, nil |
| 222 | } else { |
| 223 | msg := fmt.Sprintf("This type %x is not supported", option.Data) |
| 224 | return 0, errors.New(msg) |
| 225 | } |
| 226 | } |
| 227 | } |
| 228 | return 0, errors.New("Failed to extract MsgType from dhcp") |
| 229 | } |
| 230 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 231 | // returns the DHCP Layer type or error if it's not a DHCP Packet |
| 232 | func GetDhcpPacketType(pkt gopacket.Packet) (string, error) { |
| 233 | dhcpLayer, err := GetDhcpLayer(pkt) |
| 234 | if err != nil { |
| 235 | return "", err |
| 236 | } |
| 237 | dhcpMessageType, err := GetDhcpMessageType(dhcpLayer) |
| 238 | if err != nil { |
| 239 | return "", err |
| 240 | } |
| 241 | |
| 242 | return dhcpMessageType.String(), nil |
| 243 | } |
| 244 | |
Matteo Scandolo | 2742870 | 2019-10-11 16:21:16 -0700 | [diff] [blame] | 245 | func sendDHCPPktIn(msg bbsim.ByteMsg, portNo uint32, stream bbsim.Stream) error { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 246 | // FIXME unify sendDHCPPktIn and sendEapolPktIn methods |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 247 | gemid, err := GetGemPortId(msg.IntfId, msg.OnuId) |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 248 | if err != nil { |
| 249 | dhcpLogger.WithFields(log.Fields{ |
| 250 | "OnuId": msg.OnuId, |
| 251 | "IntfId": msg.IntfId, |
| 252 | }).Errorf("Can't retrieve GemPortId: %s", err) |
| 253 | return err |
| 254 | } |
Matteo Scandolo | eb6b5af | 2020-06-24 16:23:58 -0700 | [diff] [blame] | 255 | |
| 256 | log.WithFields(log.Fields{ |
Shrey Baid | 688b424 | 2020-07-10 20:40:10 +0530 | [diff] [blame^] | 257 | "OnuId": msg.OnuId, |
| 258 | "IntfId": msg.IntfId, |
Matteo Scandolo | eb6b5af | 2020-06-24 16:23:58 -0700 | [diff] [blame] | 259 | "GemPort": gemid, |
Shrey Baid | 688b424 | 2020-07-10 20:40:10 +0530 | [diff] [blame^] | 260 | "Type": "DHCP", |
Matteo Scandolo | eb6b5af | 2020-06-24 16:23:58 -0700 | [diff] [blame] | 261 | }).Trace("sending-pkt") |
| 262 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 263 | data := &openolt.Indication_PktInd{PktInd: &openolt.PacketIndication{ |
Matteo Scandolo | 2742870 | 2019-10-11 16:21:16 -0700 | [diff] [blame] | 264 | IntfType: "pon", |
| 265 | IntfId: msg.IntfId, |
| 266 | GemportId: uint32(gemid), |
| 267 | Pkt: msg.Bytes, |
| 268 | PortNo: portNo, |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 269 | }} |
| 270 | |
| 271 | if err := stream.Send(&openolt.Indication{Data: data}); err != nil { |
| 272 | dhcpLogger.Errorf("Fail to send DHCP PktInd indication. %v", err) |
| 273 | return err |
| 274 | } |
| 275 | return nil |
| 276 | } |
| 277 | |
Matteo Scandolo | 378b8c9 | 2020-04-16 14:34:22 -0700 | [diff] [blame] | 278 | func sendDHCPRequest(oltId int, ponPortId uint32, onuId uint32, serialNumber string, portNo uint32, cTag int, onuStateMachine *fsm.FSM, onuHwAddress net.HardwareAddr, offeredIp net.IP, stream openolt.Openolt_EnableIndicationServer) error { |
| 279 | dhcp := createDHCPReq(oltId, ponPortId, onuId, onuHwAddress, offeredIp) |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 280 | pkt, err := serializeDHCPPacket(ponPortId, onuId, cTag, onuHwAddress, dhcp) |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 281 | |
| 282 | if err != nil { |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 283 | dhcpLogger.WithFields(log.Fields{ |
| 284 | "OnuId": onuId, |
| 285 | "IntfId": ponPortId, |
| 286 | "OnuSn": serialNumber, |
| 287 | "OfferedIp": offeredIp.String(), |
| 288 | }).Errorf("Cannot serializeDHCPPacket: %s", err) |
| 289 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, onuStateMachine); err != nil { |
| 290 | return err |
| 291 | } |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 292 | return err |
| 293 | } |
| 294 | // NOTE I don't think we need to tag the packet |
| 295 | //taggedPkt, err := packetHandlers.PushSingleTag(cTag, pkt) |
| 296 | |
| 297 | msg := bbsim.ByteMsg{ |
| 298 | IntfId: ponPortId, |
| 299 | OnuId: onuId, |
| 300 | Bytes: pkt, |
| 301 | } |
| 302 | |
Matteo Scandolo | 2742870 | 2019-10-11 16:21:16 -0700 | [diff] [blame] | 303 | if err := sendDHCPPktIn(msg, portNo, stream); err != nil { |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 304 | dhcpLogger.WithFields(log.Fields{ |
| 305 | "OnuId": onuId, |
| 306 | "IntfId": ponPortId, |
| 307 | "OnuSn": serialNumber, |
| 308 | }).Errorf("Cannot sendDHCPPktIn: %s", err) |
| 309 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, onuStateMachine); err != nil { |
| 310 | return err |
| 311 | } |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 312 | return err |
| 313 | } |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 314 | |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 315 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 316 | "OnuId": onuId, |
| 317 | "IntfId": ponPortId, |
| 318 | "OnuSn": serialNumber, |
| 319 | "OfferedIp": offeredIp.String(), |
| 320 | }).Infof("DHCPRequest Sent") |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 321 | return nil |
| 322 | } |
| 323 | |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 324 | func updateDhcpFailed(onuId uint32, ponPortId uint32, serialNumber string, onuStateMachine *fsm.FSM) error { |
| 325 | if err := onuStateMachine.Event("dhcp_failed"); err != nil { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 326 | dhcpLogger.WithFields(log.Fields{ |
| 327 | "OnuId": onuId, |
| 328 | "IntfId": ponPortId, |
| 329 | "OnuSn": serialNumber, |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 330 | }).Errorf("Error while transitioning ONU State %v", err) |
| 331 | return err |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 332 | } |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 333 | return nil |
| 334 | } |
| 335 | |
Matteo Scandolo | 378b8c9 | 2020-04-16 14:34:22 -0700 | [diff] [blame] | 336 | func SendDHCPDiscovery(oltId int, ponPortId uint32, onuId uint32, serialNumber string, portNo uint32, onuStateMachine *fsm.FSM, onuHwAddress net.HardwareAddr, cTag int, stream bbsim.Stream) error { |
| 337 | dhcp := createDHCPDisc(oltId, ponPortId, onuId, onuHwAddress) |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 338 | pkt, err := serializeDHCPPacket(ponPortId, onuId, cTag, onuHwAddress, dhcp) |
| 339 | |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 340 | if err != nil { |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 341 | dhcpLogger.WithFields(log.Fields{ |
| 342 | "OnuId": onuId, |
| 343 | "IntfId": ponPortId, |
| 344 | "OnuSn": serialNumber, |
| 345 | }).Errorf("Cannot serializeDHCPPacket: %s", err) |
| 346 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, onuStateMachine); err != nil { |
| 347 | return err |
| 348 | } |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 349 | return err |
| 350 | } |
| 351 | // NOTE I don't think we need to tag the packet |
| 352 | //taggedPkt, err := packetHandlers.PushSingleTag(cTag, pkt) |
| 353 | |
| 354 | msg := bbsim.ByteMsg{ |
| 355 | IntfId: ponPortId, |
| 356 | OnuId: onuId, |
| 357 | Bytes: pkt, |
| 358 | } |
| 359 | |
Matteo Scandolo | 2742870 | 2019-10-11 16:21:16 -0700 | [diff] [blame] | 360 | if err := sendDHCPPktIn(msg, portNo, stream); err != nil { |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 361 | dhcpLogger.WithFields(log.Fields{ |
| 362 | "OnuId": onuId, |
| 363 | "IntfId": ponPortId, |
| 364 | "OnuSn": serialNumber, |
| 365 | }).Errorf("Cannot sendDHCPPktIn: %s", err) |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 366 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, onuStateMachine); err != nil { |
| 367 | return err |
| 368 | } |
| 369 | return err |
| 370 | } |
| 371 | dhcpLogger.WithFields(log.Fields{ |
| 372 | "OnuId": onuId, |
| 373 | "IntfId": ponPortId, |
| 374 | "OnuSn": serialNumber, |
| 375 | }).Infof("DHCPDiscovery Sent") |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 376 | |
| 377 | if err := onuStateMachine.Event("dhcp_discovery_sent"); err != nil { |
| 378 | dhcpLogger.WithFields(log.Fields{ |
| 379 | "OnuId": onuId, |
| 380 | "IntfId": ponPortId, |
| 381 | "OnuSn": serialNumber, |
| 382 | }).Errorf("Error while transitioning ONU State %v", err) |
| 383 | } |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 384 | return nil |
| 385 | } |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 386 | |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 387 | // FIXME cTag is not used here |
Matteo Scandolo | 378b8c9 | 2020-04-16 14:34:22 -0700 | [diff] [blame] | 388 | func HandleNextPacket(oltId int, onuId uint32, ponPortId uint32, serialNumber string, portNo uint32, onuHwAddress net.HardwareAddr, cTag int, onuStateMachine *fsm.FSM, pkt gopacket.Packet, stream openolt.Openolt_EnableIndicationServer) error { |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 389 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 390 | dhcpLayer, err := GetDhcpLayer(pkt) |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 391 | if err != nil { |
| 392 | dhcpLogger.WithFields(log.Fields{ |
| 393 | "OnuId": onuId, |
| 394 | "IntfId": ponPortId, |
| 395 | "OnuSn": serialNumber, |
| 396 | }).Errorf("Can't get DHCP Layer from Packet: %v", err) |
| 397 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, onuStateMachine); err != nil { |
| 398 | return err |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 399 | } |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 400 | return err |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 401 | } |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 402 | dhcpMessageType, err := GetDhcpMessageType(dhcpLayer) |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 403 | if err != nil { |
| 404 | dhcpLogger.WithFields(log.Fields{ |
| 405 | "OnuId": onuId, |
| 406 | "IntfId": ponPortId, |
| 407 | "OnuSn": serialNumber, |
| 408 | }).Errorf("Can't get DHCP Message Type from DHCP Layer: %v", err) |
| 409 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, onuStateMachine); err != nil { |
| 410 | return err |
| 411 | } |
| 412 | return err |
| 413 | } |
| 414 | |
| 415 | if dhcpLayer.Operation == layers.DHCPOpReply { |
| 416 | if dhcpMessageType == layers.DHCPMsgTypeOffer { |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 417 | offeredIp := dhcpLayer.YourClientIP |
Matteo Scandolo | 378b8c9 | 2020-04-16 14:34:22 -0700 | [diff] [blame] | 418 | if err := sendDHCPRequest(oltId, ponPortId, onuId, serialNumber, portNo, cTag, onuStateMachine, onuHwAddress, offeredIp, stream); err != nil { |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 419 | dhcpLogger.WithFields(log.Fields{ |
| 420 | "OnuId": onuId, |
| 421 | "IntfId": ponPortId, |
| 422 | "OnuSn": serialNumber, |
| 423 | }).Errorf("Can't send DHCP Request: %s", err) |
| 424 | if err := updateDhcpFailed(onuId, ponPortId, serialNumber, onuStateMachine); err != nil { |
| 425 | return err |
| 426 | } |
| 427 | return err |
| 428 | } |
| 429 | if err := onuStateMachine.Event("dhcp_request_sent"); err != nil { |
| 430 | dhcpLogger.WithFields(log.Fields{ |
| 431 | "OnuId": onuId, |
| 432 | "IntfId": ponPortId, |
| 433 | "OnuSn": serialNumber, |
| 434 | }).Errorf("Error while transitioning ONU State %v", err) |
| 435 | } |
| 436 | |
| 437 | } else if dhcpMessageType == layers.DHCPMsgTypeAck { |
| 438 | // NOTE once the ack is received we don't need to do anything but change the state |
| 439 | if err := onuStateMachine.Event("dhcp_ack_received"); err != nil { |
| 440 | dhcpLogger.WithFields(log.Fields{ |
| 441 | "OnuId": onuId, |
| 442 | "IntfId": ponPortId, |
| 443 | "OnuSn": serialNumber, |
| 444 | }).Errorf("Error while transitioning ONU State %v", err) |
| 445 | } |
| 446 | dhcpLogger.WithFields(log.Fields{ |
| 447 | "OnuId": onuId, |
| 448 | "IntfId": ponPortId, |
| 449 | "OnuSn": serialNumber, |
| 450 | }).Infof("DHCP State machine completed") |
| 451 | } |
| 452 | // NOTE do we need to care about DHCPMsgTypeRelease?? |
| 453 | } else { |
| 454 | dhcpLogger.WithFields(log.Fields{ |
| 455 | "OnuId": onuId, |
| 456 | "IntfId": ponPortId, |
| 457 | "OnuSn": serialNumber, |
| 458 | }).Warnf("Unsupported DHCP Operation: %s", dhcpLayer.Operation.String()) |
| 459 | } |
Matteo Scandolo | fe9ac25 | 2019-10-25 11:40:17 -0700 | [diff] [blame] | 460 | |
Matteo Scandolo | 075b189 | 2019-10-07 12:11:07 -0700 | [diff] [blame] | 461 | return nil |
Matteo Scandolo | 4b3fc7e | 2019-09-17 16:49:54 -0700 | [diff] [blame] | 462 | } |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 463 | |
| 464 | // This method handle the BBR DHCP Packets |
| 465 | // BBR does not need to do anything but forward the packets in the correct direction |
| 466 | func HandleNextBbrPacket(onuId uint32, ponPortId uint32, serialNumber string, sTag int, macAddress net.HardwareAddr, doneChannel chan bool, pkt gopacket.Packet, client openolt.OpenoltClient) error { |
| 467 | |
| 468 | // check if the packet is going: |
| 469 | // - outgouing: toward the DHCP |
| 470 | // - incoming: toward the ONU |
| 471 | isIncoming := packetHandlers.IsIncomingPacket(pkt) |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 472 | dhcpLogger.Tracef("Is Incoming: %t", isIncoming) |
| 473 | |
| 474 | pkt, err := packetHandlers.PopSingleTag(pkt) |
| 475 | if err != nil { |
| 476 | dhcpLogger.WithFields(log.Fields{ |
| 477 | "OnuId": onuId, |
| 478 | "IntfId": ponPortId, |
| 479 | "OnuSn": serialNumber, |
| 480 | "error": err, |
| 481 | }).Fatalf("Can't untag packet") |
| 482 | } |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 483 | |
| 484 | dhcpType, err := GetDhcpPacketType(pkt) |
| 485 | if err != nil { |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 486 | dhcpLogger.WithFields(log.Fields{ |
| 487 | "OnuId": onuId, |
| 488 | "IntfId": ponPortId, |
| 489 | "OnuSn": serialNumber, |
| 490 | "error": err, |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 491 | }).Fatalf("Can't find DHCP type for packet") |
| 492 | } |
| 493 | |
| 494 | srcMac, _ := packetHandlers.GetSrcMacAddressFromPacket(pkt) |
| 495 | dstMac, _ := packetHandlers.GetDstMacAddressFromPacket(pkt) |
| 496 | |
Shrey Baid | 688b424 | 2020-07-10 20:40:10 +0530 | [diff] [blame^] | 497 | if isIncoming { |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 498 | |
| 499 | onuPacket := openolt.OnuPacket{ |
| 500 | IntfId: ponPortId, |
| 501 | OnuId: onuId, |
| 502 | PortNo: onuId, |
| 503 | GemportId: 1, |
| 504 | Pkt: pkt.Data(), |
| 505 | } |
| 506 | |
| 507 | if _, err := client.OnuPacketOut(context.Background(), &onuPacket); err != nil { |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 508 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 509 | "OnuId": onuId, |
| 510 | "IntfId": ponPortId, |
| 511 | "OnuSn": serialNumber, |
| 512 | "Type": dhcpType, |
| 513 | "error": err, |
| 514 | }).Error("Failed to send DHCP packet to the ONU") |
| 515 | } |
| 516 | |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 517 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 518 | "OnuId": onuId, |
| 519 | "IntfId": ponPortId, |
| 520 | "OnuSn": serialNumber, |
| 521 | "Type": dhcpType, |
| 522 | "DstMac": dstMac, |
| 523 | "SrcMac": srcMac, |
| 524 | "OnuMac": macAddress, |
| 525 | }).Infof("Sent DHCP packet to the ONU") |
| 526 | |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 527 | dhcpLayer, _ := GetDhcpLayer(pkt) |
| 528 | dhcpMessageType, _ := GetDhcpMessageType(dhcpLayer) |
| 529 | if dhcpMessageType == layers.DHCPMsgTypeAck { |
| 530 | doneChannel <- true |
| 531 | } |
| 532 | |
| 533 | } else { |
| 534 | // double tag the packet and send it to the NNI |
| 535 | // NOTE do we need this in the HandleDHCP Packet? |
| 536 | doubleTaggedPkt, err := packetHandlers.PushDoubleTag(sTag, sTag, pkt) |
| 537 | if err != nil { |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 538 | dhcpLogger.WithFields(log.Fields{ |
| 539 | "OnuId": onuId, |
| 540 | "IntfId": ponPortId, |
| 541 | "OnuSn": serialNumber, |
| 542 | "Type": dhcpType, |
| 543 | "error": err, |
| 544 | }).Error("Failed to add double tag to packet") |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 545 | } |
| 546 | |
| 547 | pkt := openolt.UplinkPacket{ |
| 548 | IntfId: 0, // BBSim does not care about which NNI, it has only one |
| 549 | Pkt: doubleTaggedPkt.Data(), |
| 550 | } |
| 551 | if _, err := client.UplinkPacketOut(context.Background(), &pkt); err != nil { |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 552 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 553 | "OnuId": onuId, |
| 554 | "IntfId": ponPortId, |
| 555 | "OnuSn": serialNumber, |
| 556 | "Type": dhcpType, |
| 557 | "error": err, |
| 558 | }).Error("Failed to send DHCP packet out of the NNI Port") |
| 559 | } |
Matteo Scandolo | e0e9b77 | 2020-02-03 14:23:43 -0800 | [diff] [blame] | 560 | dhcpLogger.WithFields(log.Fields{ |
Matteo Scandolo | 40e067f | 2019-10-16 16:59:41 -0700 | [diff] [blame] | 561 | "OnuId": onuId, |
| 562 | "IntfId": ponPortId, |
| 563 | "OnuSn": serialNumber, |
| 564 | "Type": dhcpType, |
| 565 | "DstMac": dstMac, |
| 566 | "SrcMac": srcMac, |
| 567 | "OnuMac": macAddress, |
| 568 | }).Infof("Sent DHCP packet out of the NNI Port") |
| 569 | } |
| 570 | return nil |
| 571 | } |